Shinwa H-101A 150 mm Rigid (15 mm x 0.5 mm) Zero Glare Satin Chrome Stainless Steel Machinist Engineer Ruler / Rule with Graduations in mm and .5 mm Made from the finest stainless steel available and is hardened and tempered Has a zero glare satin chrome finish which makes it easy to read and will prevent corrosion mm and .5mm markings are precision photo etched and then black filled for easy readability Rule is 15 mm wide and .5 mm thick Conforms to Japanese Industrial Standard (JIS) B 7516 Grade 1